Creating an bevel inset on an imported SVG
Use a custom bevel curve with the desired shape.

Draw a quarter circle and use as bevel object on the original curve.



EDIT

Upon looking at your file your Bevel curve is waaay too big in relation to your SVG imported curve, its center is incorrectly positioned, and the bevel curve is scaled zero in Z.

Reduce its size in edit mode, and clear its scale. The normals are also inverted, you may also need to Switch Direction of your bevel curve in Edit Mode to display correctly.

Also your imported SVG is quite complex in shape, with high curvature and very tight corners, it is hard to bevel it correctly, you probably have to accept a certain degree of errors, or be willing to fix them by hand.